Sample Activity

A = bh-2×½(½(b-a))h A = ½ah+½bh
Rotate and make a parallelogram
A = h(b-(½(b-a)))
A = ½(a+b)h A = (½a+½b)h
Split into three triangles using the midpoint of the top

Split in half and rearrange to make a rectangle
A = ½bh+2×½×½ah
Add two triangles to make a parallelogram

Split into three triangles using the midpoint of the base

Split into two triangles

By considering the isosceles trapezium on the left, match a formula for the area to a visualisation for deriving it.
Matching buddies have the same colour letter.

EXIT